Tweco CutMaster 12mm - Manual (Page 33)

CUTMASTER 12mm
Manual 0-5076 OPERATION 4T-1
SECTION 4 TORCH:
OPERATION
4T.01 Torch Parts Selection
Depending on the type of operation to be done determines the
torch parts to be used.
Type of operation:
Drag cutting, standoff cutting or gouging
Torch parts:
Shield Cup, Cutting Tip, Electrode and Starter Cartridge
NOTE
Refer to Section 4T.07 and following for additional
information on torch parts.
Change the torch parts for a different operation as follows:
WARNING
Disconnect primary power at the source before
assembling or disassembling torch parts, or torch
and leads assemblies.
NOTE
The shield cup holds the tip and starter cartridge in
place. Position the torch with the shield cup facing
upward to keep these parts from falling out when
the cup is removed.
1. Unscrew and remove the shield cup assembly from
the torch head.
2. Remove the Electrode by pulling it straight out of the
Torch Head.
A-03510_AB
Electrode
Start Cartridge
Tip
Shield Cup
Torch Head
Torch Parts (Drag Shield Cap & Shield Cup Body Shown)
3. Install the replacement Electrode by pushing it straight
into the torch head until it clicks.
4 . Install the starter cartridge and desired tip for the
operation into the torch head.
5. Hand tighten the shield cup assembly until it is seated
on the torch head. If resistance is felt when installing
the cup, check the threads before proceeding.
4T.02 Cut Quality
NOTE
Cut quality depends heavily on setup and param-
eters such as torch standoff, alignment with the
workpiece, cutting speed, gas pressures, and
operator ability.
Cut quality requirements differ depending on application. For
instance, nitride build - up and bevel angle may be major fac-
tors when the surface will be welded after cutting. Dross - free
cutting is important when finish cut quality is desired to avoid
a secondary cleaning operation. The following cut quality
characteristics are illustrated in the following figure:
Kerf Width
Cut Surface
Bevel Angle
Top Edge
Rounding
Cut Surface
Drag Lines
Dross
Build-Up
Top
Spatter
A-00007
Cut Quality Characteristics